Subject:
DOCS for BUGG-POWER external power supply IIGS/IIe/II+
Date:
Mon, 6 Feb 2006 14:27:35 -0700
From:
Stephen E Buggie
Organization:
University of New Mexico, Albuquerque
Newsgroups:
comp.sys.apple2
Shown at KansasFest 1996 rev. June
1997
USER'S MANUAL:
IBM-TO-APPLE IIGS POWER SUPPLY AND CABLE ADAPTOR
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
V. 1.5
Stephen Buggie
OUTLINE
Psychology Dept.
Univ. of New Mexico-Gallup IBM POWER SUPPLY IIGS INSTALLATION
PROCEDURE
200 College Rd.
INTRODUCTION
Gallup, NM 87301 SWITCHING-STYLE POWER
SUPPLIES
APPLE II AND IBM POWER
SUPPLIES
buggie@unm.edu POWER SUPPLY CABLE: DESIGN
FEATURES
voice: (505) 863-7504 w DETAILED INSTALLATION AND CHECKING
PROCEDURE
voice: (505) 863-2390 h WIRE INSULATION COLOR CODES: APPLE II AND
IBM
fax: (505) 863-7532 COOLING FAN
NOISE
RISKS AND
COMPLICATIONS
SELECTED BIBLIOGRAPHY ON POWER
SUPPLIES
MONEY-BACK GUARANTEE AND LIMITED
WARRANTY
AUTHOR'S NOTES AND
ACKNOWLEDGMENTS
IBM POWER SUPPLY IIGS INSTALLATION PROCEDURE
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
These are the installation steps for this power supply and cable:
(a) Carefully unwrap the power supply. Use no knife or blade.
(b) With all power OFF, and after discharging any static, remove
the
present internal power supply -- a plastic clip at the keyboard end of the
motherboard holds it in.
(c) Carefully unplug the present internal power supply from the
Molex-7 connector on the motherboard.
(d) Use a DC voltmeter to CHECK THE VOLTAGES of the wires on the
Molex-7 plug (+5v, +12v, -12v, and -5v) before connecting to the IIgs.
[This
is an important precaution!] Some units require that a load (such as an
old
hard drive) be attached to a Molex-4 accessory plug to get accurate
readings.
With minimal load, voltages will normally be lower than the target values.
(e) Place the IBM power supply on the floor under the computer
table
-- position it so that there is no danger of objects (paper clips, pens,
etc.) falling off the table into a fan opening, nor of liquids being
spilled
into it.
(f) String the 6-wire cable up to the back panel of the IIgs, and
into
the computer.
(g) Carefully line up the Molex-7 plug with the male motherboard
connector. The two black wires are towards the keyboard-front of the
computer; the plug's "polarizing-ramp" faces towards the slots.
(h) Slowly push the plug onto the motherboard power connector.
(i) Put the lid on the CPU, then System Saver (if used), and the
monitor.
(j) Connect the power plug of the IBM power supply to your System
Saver IIgs (or to power strip). Continued use of the Kensington System
Saver
or AE Conserver is recommended to minimize heat that originates in the
motherboard or interface cards,
(k) Enjoy 150/200 watts of clean power in your Apple IIgs; say
goodbye
to crashes and freeze-ups attributable to low power!
INTRODUCTION
HHHHHHHHHHHH
Installing a high-powered (150-200 watt) IBM-style power supply
will
eliminate low-power problems suffered by Apple II users whose Apples are
loaded with accessories. You will now be able: (a) to add four or more
disk
drives, (b) fully populate all your RAM cards, (c) fill all slots with
large cards, (c) reduce overheating problems by having an external,
rather
than internal, power supply.
SWITCHING-STYLE POWER SUPPLIES
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Power supplies for electronics are of two general types: (a)
step-down transformers with DC rectifiers and one or more secondary
windings,
and (b) switching power supplies which rectify the AC power to DC, then
create the target voltages by rapidly switching the power on and off.
Switching power supplies include complex regulation and protection
circuits
so that power is turned down if the target voltage strays beyond the
limits
of narrow acceptable ranges. Switching power supplies are more expensive
but
safer; they are used in all computers including Apple II, IBM, and
Macintosh.
Switching power supplies can fail, but when failure occurs the output
voltage drops rather than going berserk, as can happen with others.
APPLE II AND IBM POWER SUPPLIES: BASIC FEATURES
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Apple II and IBM power supplies share similarities: Both are
designed
as switching (internally protected) power supplies; both give the same DC
output voltages (+5v, +12v, -12v, -5v). Both are designed originally to
be
installed inside the computer.
The Apple II power supply delivers about 45-60 watts. It is fully
enclosed, has no fan, and has a difficult-to-replace internal soldered
fuse.
The IIe/II+ version uses a 6-pin motherboard plug (Molex red brick
miniature
rectangular Matrix housing, Digi-Key part no. A14113-ND). The IIgs
version
has a brushed aluminum housing with different mount, and a distinctive
motherboard connector plug (Molex .156" 7-pin center-crimp terminal
housing
with locking ramp; Molex no. 09-50-3071, Digi-Key part no. WM-2105-ND).
The
Apple II power supply is adequate for the average user, but inadequate for
"flagship" Apple IIs loaded with RAM, extra cards, or more than two disk
drives. Symptoms of power overload "brownouts" include spontaneous
crashes
and "freeze-ups" that require rebooting. With adequate power capacity,
crashes and freeze-ups should not occur.
IBM-style power supplies are big and impressive. Even the smaller
IBM-style power supplies deliver 150 watts, 2.5 times the output of the
standard Apple II power supply. Newer models deliver 200-300 watts and
may
be smaller in physical size than the older 150 watt models. All have
cooling
fans; most have selectable dual input voltages: 110/220v AC.
Nearly all IBM power supplies run cool when used with Apples; the
fan is unnecessary. Even after many hours of continuous use with the
Apple, IBM power supplies generate little or no noticeable heat. Lack of
overheating reduces thermal strain on electronic parts.
Output connectors on IBM power supplies appear at first
glance to be a
bird's nest of insulated wires and connectors. But there are only three
distinct connectors:
P8: (includes blue wire -12v)
P9: (includes white wire -5v)
Molex-4: (three to five 4-pin connectors; these are for internal
drives.)
Identical colors always give the same output voltage. For example,
multiple red wires all give +5v DC. Identically-colored wires can be
soldered together to give higher amperage at the stated voltage.
Shopping for a Used IBM Power Supply: These are widely available
at
thrift shops, yard sales, or on the internet itself. Prices are cheap,
especially for the older larger units, because they are too large to be
used
with modern small CPUs. Prices are $20.00 or less for working power
supplies. If building your own, shop locally for a power supply so that
its operation can be verified.
When you find one, first note its odor: It should NOT have the
strong
pungent smell of cooked electronics. A mild electronic odor is o.k. ---
the
odor originates with a volatile varnish that is painted on the components.
The smell of the varnish (hopefully) signals the user that the item is
overheated. Next, plug it in and observe the cooling fan's movement. If
the
fan begins to spin quickly and maintains its speed, then the +12v line is
o.k. But if the fan fails to spin, or if it quits soon after power-up,
then
the protection circuits have intervened to shut the power supply down.
This,
by itself, is sufficient reason not to buy the power supply! Shake the
unit
and listen for rattling sounds. If the rattle is plastic, then damage is
unlikely; but if the rattle is a metal object (paper clip, pin, screw,
bolt,
etc.) then the power supply likely has suffered a short on the motherboard
and should be avoided.
Bring a DC voltmeter when shopping for a power supply. With the
115v
power on, check the DC output voltages: +12v, +5v, -12v, -5v. (NOTE: On
some power supplies, the +12v line will drop to +8v or even to total
shutoff when no load is attached to the power supply. This voltage drop
reflects the normal operation of protection/ shutdown circuits and is not
a defect. When a moderate load is attached (such as a hard drive attached
to a Molex-4 connector), then the voltage of the +12v line will return to
normal.
POWER SUPPLY CABLE: DESIGN FEATURES
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
This power supply cable is designed for durability and top
performance when used with the Apple II. Note these features:
(a) Heavy-duty stranded wire (AWG-18): This is the heaviest grade of wire
that will fit on the Molex and AMP connectors. Most wires are
American-made.
(b) Heavy-duty insulation: Wires are wrapped with color-coded 600v heavy
duty insulation. (Standard insulation is rated merely at 300v.)
Heavy-duty
insulation gives maximum protection against inter-wire shortages within
the
6-conductor cable; it also minimizes the risk of damage by wire-chewing
puppies or infants who may be nearby on the floor near the computer desk.
(c) Durable interwire connections: Soldered wire-to-wire connections are
covered securely to eliminate shorts: First, the soldered connection is
painted with an insulating paint; next, two layers of polyolefin
shrink-tubing are added to insulate and strengthen the joint.
High-current
lines (+12v, +5v) are connected to multiple wires coming from the power
supply. Unused wires are trimmed, insulated, and tucked in bundles. The
entire six-wire cable is secured together with sections of 1/2"
shrink-tubing
and nylon ties.
(d) A Molex-4 connector left intact: The IBM power supply has two
connectors (P8, P9) that transfer power to the motherboard, plus 3-5
Molex-4
female connectors that empower the disk drives. A Molex-4 female
connector
has been left intact; extras have been removed. The Molex-4 crimp pins
deliver these high amperage voltages: (+12, neg, neg, +5v). The Molex-4
is useful for several reasons: (a) It can be used for testing a hard
drive,
which receives power via the Molex-4; (b) the +12v and +5v lines, the
most
important outputs, can be monitored with a DC voltmeter from the Molex-4,
and (c) other appliances such as indicator lights or a hard drive can be
attached to the Molex-4 connector.
(e) The finest crimp-pins ("Trifurcon," from Digi-Key) have been used in
power supplies shipped since July 1996. Previously, "Jameco generic"
crimp-pins were used. Trifurcon crimp-pins are superior because they
surround the male pin on three sides, giving better electrical contact.
This enables the transfer of maximum amperage from the power supply to
the motherboard.
(f) Note that the 6 ft grounded 120v ac power cord is NOT INCLUDED with
the power supply. The standard Apple II power cable works perfectly with
IBM-style power supplies.
(g) A female Molex-4 connector is left intact on each power supply, mainly
as a site for voltage testing. But this connector can be used as a
stabilized source of DC voltage (either +5v dc or +12v dc) for small
appliances such as cassette players, radios, pencil sharpeners, etc. Most
items that use 6v dc will work with 5v dc supplied by this power supply.
I use a pencil sharpener at a Molex-4 plug, and its use creates no
interference whatsoever with the computer. For $3 plus shipping, I can
make a plug-in cable with male Molex-4 plug, 6 ft cable, and 2.1mm barrel
plug> Specify whether the barrel plug center pin should have positive or
negative polarity.
(h) Only six wires are used on the 7-pin Molex-7 plug; an unused space is
located between a black ground wire and the orange (+5 vdc) wire. This
empty space is plugged with adhesive caulk and a polarizing plug.
Blocking the unused third hole on the plug is a safely feature to
eliminate the electrical risk of inserting the Molex-7 plug off-center on
the motherboard connector.
DETAILED INSTALLATION AND CHECKING PROCEDURE
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
(a) Carefully unwrap the power supply. Use no knife or blade.
SHAKE
the power supply gently to judge whether any movable foreign objects are
rattling inside the unit.
(b) With all power OFF, and after discharging any static, remove
the
present internal power supply --- a plastic clip at the keyboard end of
the
motherboard holds it in. Pry the plastic retaining clip forward, and lift
the original IIgs power supply out of the way.
(c) Carefully unplug the present internal power supply from the
Molex-7 connector on the motherboard. A pliers may be used, pulling
SLOWLY
and CAREFULLY in an upward direction. Do not break off any of the six
pins
on the male motherboard connector. The spring ramp-grabbers on the right
edge may need to be deflected with a knife or ruler so that the plug can
be
released.
(d) Use a DC voltmeter to CHECK THE VOLTAGES of the wires on the
Molex-7 plug (+5v, +12v, -12v, and -5v) before connecting the IBM supply
to
the IIgs. [This is important!] The probes of the DC voltmeter are likely
too
large to fit the small openings on the Molex-7 plug. To test the voltage,
clip two segments of a paper clip and insert them temporarily in the
pin-windows of the Molex-7 plug, taking care to avoid short circuits.
(Crimp pins in the Molex-7 plug can be damaged by thick voltmeter probes;
use paper clip sections to contact the crimp pins. Touch the voltmeter
probes to the paper clip segments to measure the voltage. Take care to
avoid shorting the power supply.
(e) Place the IBM power supply on the floor under the computer
table
-- position it so that there is no danger of objects (paper clips, pens,
etc.) falling off the table into a fan opening, nor of liquids being
spilled
into it. This is important: paper clips could jam the fan or hit the
motherboard and fry the power supply.
(f) Route the 6-wire cable up to the back panel of the IIgs, and
into
the computer. The cable may be routed through the rectangular hole on the
back panel behind the original power supply. (I used a thin-nose pliers
to
break off a section of thin plastic so that the plug can be passed easier
through the back panel.)
(g) Carefully line up the Molex-7 plug with the motherboard
[The two black wires are positioned towards the keyboard-front of the
computer; the plug's slanted "polarizing-ramp" must face towards the
slots.]
(h) SLOWLY push the plug straight down onto its mating motherboard
power connector. The polarizing-ramp on the plug will make a click sound
when the ramp-grabbers secure it.
(i) Remount the lid onto the CPU, then System Saver (if used), and
the
monitor.
(j) Connect the power plug of the IBM power supply to your System
Saver IIgs (or to 115v power strip).
(k) Enjoy 150/200 watts of clean power in your Apple IIgs; say
goodbye
to crashes and freeze-ups attributable to low power!
INSTALLATION INSTRUCTIONS: IIE/II+ VERSION
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
(a) All power in the computer must be OFF. Turn the CPU
upside down. Remove the four screws that attach the power supply to the
bottom of the CPU.
(b) Turn the CPU to its normal upright position. Lift the power
supply out of the CPU.
(c) Remove any interface card from slot #1 to allow room for
you to grasp the motherboard connector. Grasp the connector plug by its
sides and squeeze. Lift the plug off the motherboard connector.
(d) Place the 150 watt power supply on the floor, below the
computer table. String its 5 ft cable through the back panel of the
computer.
(e) Position the power plug over the motherboard connector. Note
that the two BLACK wires on the connector must be oriented towards the
keyboard, and the GREEN and BLUE wires must be oriented towards the back
panel of the CPU. Push the plug onto the motherboard connector. (Mating
notches on the plug and motherboard connector prevent the plug from being
placed on the connector in anything other than the correct way; its safe
and foolproof.)
(f) Return any interface cards removed to their appropriate slots.
Put the CPU cover back on, and turn on the power!
WIRE INSULATION WIRE COLOR-CODES: APPLE II AND IBM
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Color codes generally are consistent within brands, but variations
occur! Power supplies produced for the European market may vary from the
colors stated here. The placement of the voltage lines on the connector
plugs are standard but colors vary. Voltages/colors must be verified with
a
DC voltmeter for each power supply. The output voltages are normally LESS
THAN these values when measured without a full CPU load attached.
VOLTAGE APPLE II IBM
-------------------------------------------
ground Black Black
+5v Orange Red
+12v Yellow Yellow (or Orange)
-12v Green Blue (or Brown)
-5v Blue White (or Yellow)
COMPATIBILITY WITH RAMFAST AND/OR SECOND SIGHT CARDS
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
So far (Dec 1996), I have shipped about 20 IIe/II+
power supplies and about 48 IIgs power supplies. 100% compatibility has
been reported with all configurations of IIe/II+. But IIgs users are more
likely to have their computers loaded with exotic interface cards. There
have been 5-6 reported cases of interface card / power supply
incompatibilities by IIgs users. No hardware has been damaged; the
incompatibilities cause crashes but no damage. These incompatibilities
relate to RamFast and/or Second Sight video cards. In half the cases,
replacement power supplies have solved the problem.
Why the incompatibilities? Two hypotheses are likely:
(a) maybe these cards are sensitive to the slower rise-time to the target
voltage which is characteristic of large power supplies, or (b) possibly
RamFast and Second Sight do not like a safety feature, the "no-load
auto-off" circuit. This circuit is a desirable safety feature, which
shuts the unit down if no load is detected on the output circuits. This
protection circuit is common to half the IBM-power supplies --- its
presence can be identified merely by checking whether the fan spins when
power is on but no load is attached.
To minimize the risk of an incompatibility, IIgs users
are asked to list their interface cards, and especially to mention whether
their IIgs has either a RamFast or Second Sight card. Having this
information will help me to ship the most compatible power supply model.
The no-load auto-off circuit is a desirable safety
feature in power supplies, so I will ship this version to users who
indicate that they have neither of the two fussy cards (RamFast or Second
Sight).
COOLING FAN NOISE
HHHHHHHHHHHHHHHHH
Fan noise is part of IBM folklore; all of us have seen IBM PCs
that
sounded like reincarnated vacuum cleaners. Ball-bearing fans are quieter
than sleeve fans. The IBM fan is powered from the +12v DC line. This fan
differs from the AC 110v fan in Apple II System Savers. These options are
available:
(a) Position the IBM power supply at a distant corner below the computer
desk
so that its audible sounds are unnoticed.
(b) Remove or disconnect the fan. Most IBMs run cool with Apple II
because
the load is only 1/3 the power supply's capacity. The fan could be
disconnected or removed but this is NOT recommended.
(c) Beginning in summer 1997, a $5.00 option is offered: COOLING FAN
SPEED KNOB. This is a five watt wire-wound heavy-duty potentiometer of
100-500 ohms resistance. The potentiometer is wired in series with the DC
12 volt fan, and is mounted on the casing. With this knob, fan noise can
be reduced by running the fan at a slightly slower speed. The fan should
be started at FAST speed, then dialed back to a quiet slower speed. The
user should ensure that the fan is spinning during use; do NOT totally
shut off the fan. It is insufficient to slow the fan merely by moving the
red (live) wire from +12v DC to +5v DC, because the fan will not start to
spin with just 5v DC. The fan needs +12v DC to begin to spin. The user
must verify that the unit operates coolly if the unit is run with slowed
fan speed.
RISKS AND COMPLICATIONS
HHHHHHHHHHHHHHHHHHHHHHH
1. Follow usual precautions: All computer power OFF when connecting or
disconnecting accessories; also, discharge static before going into the
CPU.
Note though, that when the internal power supply is replaced, you will
need
to discharge static by touching a lamp, metal file cabinet first.
2. Metal objects (paperclips, etc.) may spill into the power supply on
floor,
especially through the fan openings. Put a barrier (e.g., plastic lid for
tennis balls, coffee, etc.) on the power supply if a fan opening is facing
upward.
3. If drinks or other liquids are occasionally spilled on the floor near
your
computer desk, then it may be prudent to raise the height of the power
supply
1"-3" above the floor by placing height spacers below it.
4. Puppies, babies, etc. may damage the cable or external power supply.
The
heavy duty 600v insulation gives maximum protection, but keep young kids
and
puppies away from the power supply!
5. When transporting your computer, remember that the MOLEX-7 PLUG and its
motherboard mating socket are delicate! Either carefully remove the plug,
or
secure the cable so that movement won't stress the plug.
6. Fan openings in the case expose the power supply at risk to rain damage
when using the computer outdoors.
7. An Internet correspondent stated that high capacity power supplies can
create problems because the underloaded power capacity makes the internal
protection circuits less responsive.
8. The older RamFast SCSI cards by C.V. Technologies appear to be finicky
about the 200 watt power supplies. If you have an older (Rev. B or Rev.
C) RamFast card, then the you should get the 150 watt version, not the
200 watt version. Why? I suspect that the 150 watt version delivers
output voltages that are more precisely on target because the load is
closer to the power supply's capacity.
9. Two users (among 68 users so far) have expressed concern about radio
frequency (RF) interference emanating from the cable. Presently I am
trying out a metal braid shielding option (MagnaBraid, available from auto
parts supply shops), but it is premature to judge at this time whether
this shielding makes any difference. Most users have reported no RF
interference.
10. Do not damage the Molex-7 crimp-pins by pushing voltmeter probes into
them! The standard voltmeter probes are too wide for insertion into the
Molex-7 plug. Two safer options are available: (a) Clip a 1" lengths of
jumbo paper clip, then insert that section into the crimp-pin opening.
Measure voltage by touching the voltmeter probe to the paper clip. (b)
Touch the voltmeter probes on the metal strips exposed on the back side of
the Molex-7 plug.
11. Some large power supplies have a slower "rise-time" to their target
voltages. If the Apple crashes immediately at power-up, then allow 5-10
seconds of warm-up, followed by a PR#n "warm re-boot," where n is the slot
number of your hard drive card (Typically this is PR#7 if you boot from
the hard drive as most users do.)
12. The Molex-7 IIgs power plug may feel stiff because of the clear
silicon caulking that surrounds the wires. The silicon adhesive
strengthens the wires and crimp pins. It is flexible, so just bend the
wires slowly as they are positioned in the IIgs casing.
13. Does plug insertion endanger the male pins of the motherboard IIgs
connector? This is doubtful; All the power supplies are pretested prior
to shipment on my two IIgs systems at home. Each motherboard power point
has had MANY power supplies connected, and no pins have been broken yet.
TROUBLE-SHOOTING TIPS
HHHHHHHHHHHHHHHHHHHHH
PROBLEM COMMENTS / WHAT TO DO
===========================================================================
UNIT DOES NOT POWER-UP. 1. Check power switch: "|" is on, "0" is off.
2. Try a different AC power cord; internal crimps
on the AC power cord's female connector may be
spread too wide to make good contact with the
power unit's male input prongs.
3. Shake the power supply and listen for rattling
sound. Rough handling during shipment may
have
shaken loose the internal fuse. (Fuse is
soldered to holder in half the power units,
but
is clamped in place in half the units.)
4. Fuse may have blown; must be inspected
visually
by opening the case with power cord unplugged.
5. Use caution if testing voltages with standard
voltmeter probes inserted into IIgs female
Molex-7 plug, or into IIe female AMP-6 plug.
Voltmeter probes are too wide for the crimp
pins, and will spread the crimps, causing poor
contact on the motherboard connector. Safe
way
to test voltages is to insert short length of
paper clip into the plug, then touch voltmeter
probe to paper clip metal. Alternatively,
IIgs
Molex-7 plug has exposed metal strips on its
back side on which voltmeter probes can be
safely touched.
UNIT STARTS BUT SHUTS 1. Half the units have "no-load auto-off"
OFF IMMEDIATELY. protection circuit, which shuts off power
immediately if no load is connected. If power
supply has this feature, the phrase is etched
near the power switch. Voltage can be tested
by connecting a load (such as a hard drive) to
a
Molex-4 connector; fan will spin and voltages
can be tested.
UNIT POWERS-UP BUT 1. This is more often a problem with IIgs ROM 3
than
APPLE THEN CRASHES with IIgs ROM 1 or with IIe. Some large power
IMMEDIATELY. supplies have a slower "rise-time" to their
target voltages. Solution is to do a "warm
reboot." Allow 5-10 seconds for power unit to
warm up; get basic prompt ], then do "PR#n"
with n being the slot number of your launching
disk drive. Typically this is PR#7 or PR#6.
ARE INTERFACE CARDS 1. Remove all interface cards, and boot-up the
INCOMPATIBLE WITH computer. If boot succeeds, then add
interface
POWER SUPPLY UNIT? cards one at a time, booting up. Fussy
interface
card will make computer crash. This procedure
identifies any problem interface card.
MEASURED VOLTAGES SEEM 1. Orange +5v, yellow +12v, green -12v, blue -5v.
TOO LOW. As a safety feature, the output voltages are
normally LESS than these values when measured
without full load attached. When connected to
computer motherboard load, voltages will reach
their expected target values.
HOLES IN BACK OF IIGS 1. Note that there are two holes at rear of CPU
CASE ARE TOO SMALL case behind location of internal power supply.
TO THREAD CABLE TO Use thin-nose pliers to remove small amount of
MOTHERBOARD CONNECTOR; thin plastic around the larger (rectangular).
MOLEX-7 PLUG IS TOO BIG. hole. Then Molex-7 plug and cable will pass
through.
CLEAR SILICON CAULK 1. Clear silicon caulk was added to reduce strain
ON IIGS OR IIE CABLE on individual wires. IT IS FLEXIBLE. Slowly
PLUG SEEMS TOO STIFF bend the power cable after threading it into
TO MAKE RIGHT-ANGLE the CPU case; it will fit successfully on the
BEND TO CONNECT TO motherboard male connector.
MOTHERBOARD.
CABLE MOLEX-7 PLUG 1. Shine bright light into CPU. Be sure that
WON'T MATE WITH MALE Molex-7 plug is correctly centered on mother-
MOTHERBOARD CONNECTOR. . The polarizing-key in plug's third hole
prevents Molex-7 plug from being inserted
off-center. Polarizing-ramp on IIgs plug
must face the slots. With IIe version, the
AMP-6 plug's two black wires must be
positioned closest to the keyboard
(front) side of the CPU.
COOLING FAN IS NOISY. 1. This is a normal feature of IBM-style power
units. Some sound like vacuum cleaners'
cousins!
Take advantage of the 5 ft cable to position
the
unit under your computer table, away from
ears.
2. If sound suggests that an object has fallen
into
the unit through a fan opening, SHUT OFF the
unit
immediately and shake unit so object will fall
out. Disconnect AC power, open unit, remove
item.
3. Most units generate no heat when used with
Apples, so the fan speed can be slowed with
the
$5.00 optional fan speed knob. (The IBM-style
fan is designed for +12v DC and its speed is
controllable with a 5 watt wire-wound
potentiometer in the 100-500 ohm range. Do
NOT
attach a potentiometer to the System Saver
115v
AC fan!)
WORRIED ABOUT SPILLED 1. Let unit rest on floor, but on raised platform
LIQUIDS OR FALLEN METAL (box, brick, etc.) to protect against spilled
OBJECTS (PAPER CLIPS, liquids on floor.
ETC.) ENTERING THE 2. When fan-hole faces upward, place a plastic
UNIT. cover (coffee can lid, etc.) over fan-hole to
guard against metal objects falling into unit.
3. If drink spills into unit, then turn off and
disconnect AC power immediately. Allow 3-5
days
to dry completely. Test voltages before
reconnecting power unit to computer.
USER'S MANUAL: IN SOME 1. Paper and disk versions of the manual are 90%
PASSAGES, PAPER VERSION identical, but recent UPDATES are presented on
DIFFERS FROM DISK this version supplied on disk. Read the disk
VERSION. version!
BIBLIOGRAPHY ON POWER SUPPLIES
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Apple Computer Inc. (1987). Apple IIgs Hardware Reference. Reading MA:
Addison Wesley Publishing, 192-193.
Buggie, S. E. Power-boosting the IIgs: A how-to guide for ending low-
power hassles. JUICED.GS, vol. 1, no. 4, 14-15.
MONEY-BACK GUARANTEE
HHHHHHHHHHHHHHHHHHHH
Each adapter cable or power supply will be thoroughly tested on my
own
computer (IIgs or IIe) prior to shipping. Voltages are checked repeatedly
during assembly, and each cable/ power supply is tested for stability with
a
4-7 day minimum duration test run on my computers. None will be shipped
if
there is any doubt about its safety.
If you are dissatisfied for any reason with this IIgs adaptor cable
or
power supply, return it to me within 90 days and I will send a refund or
replacement, at your option. Buyer pays shipping both ways.
Compatibility with finicky interface cards cannot be
guaranteed, but I will happily ship an exchange replacement power unit if
the original is returned first. Buyer must pay all shipping.
LIMITED LIABILITY
HHHHHHHHHHHHHHHHH
The buyer must carefully recheck the voltages delivered at the
Molex-7 power plug prior to connecting it to the computer, and should
monitor its operations thereafter. Seller's liability is limited to
refund of purchase price or replacement of the power supply/cable
combination or cable. Responsibility is NOT ACCEPTED for any
consequential damages, including but not limited to fire, explosion, or
damage to motherboard, interface cards, or peripherals.
AUTHOR'S NOTES AND ACKNOWLEDGMENTS
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
1. This is an early version (v. 1.4) of these docs. Comments and
corrections from users and other interested readers are welcome.
2. This manual was written for Apple IIgs users. Similar IBM-to-Apple
power
supplies and cables are available for use with the Apple IIe and II+; the
only difference is that the AMP 2x3 motherboard connector is attached
instead
of the Molex-7 used on the IIgs. Prices are the same for IIe or IIgs.
3. Readers may buy spare motherboard connector plugs and crimp-pin sets
will
be sent for $2.00 per set, including postage. A spare 7th crimp-pin will
be
included with the set. Specify whether the motherboard plug and pins are
for
the IIgs or for the IIe. Send $2.00 check to Stephen Buggie, UNM-G, 200
College Rd., Gallup, NM 87301.
4. I am indebted to many who contributed advice on this project. Advisors
were: Bill Bredenhoft, David Ciotti, John Daniels, Doug Durkee, Tim
Gaines, Steve Jensen, Jeff Kloosterman, Hank Levinson, Jim Pittman, Mitch
Spector, Samir Wahid, and David Wilson.
v.1.5
June 15, 1997
=========================================================================
BUGGIE'S PRICE LIST: FEBRUARY 2006
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Shipping is extra on all items, but I ship cheapest available way;
typically UPS-groundtrack within lower-48 states. To Canada, Hawaii,
Alaska, or other countries, shipping is via post office surface mail.
Shipping must be estimated and paid in advance. For UPS within the lower
48 states, $13. is estimated for shipping a single power supply. If
actual
shipping is more than $2 off (either estimated too low or too high), then
a follow-up check with the actual difference should be exchanged after the
shipment has been completed.
Returns: Satisfaction is guaranteed and buyer can return the unit for
refund or exchange if dissatisfied. Refund will be for the amount paid,
less shipping costs. The buyer must pay shipping in both directions. In
the event of an exchange due to incompatibility, the buyer should enclose
payment for the shipment of the second unit. This will be expected in the
event that the unit works well on my computer. But if the unit is
actually defective, then I will pay shipping on the second unit. (So far,
all returns have been due to incompatibilities, no defects).
IIGS: 150 WATT POWER SUPPLY: $20.00
IIE or II+ 150 watt power power supply: $15.00
200 WATT POWER SUPPLY: $25.00
IIE or II+ 200 watt power supply: $20.00
FAN SPEED ADJUSTER KNOB: Add $5.00 (allows cooling fan noise to be
reduced
by dialing a slower speed)
EXTRA CABLE LENGTH beyond 5 ft: Add $1.00 per ft length.
ACCESSORY CABLE: Supplies either 12v dc or 6 v dc to male Molex-4 plug,
with 5 ft cable leading to 2.1 mm barrel plug. Specify
voltage
(5 v dc or 12 v dc), and also whether the barrel plug center
should
have positive or negative polarity. $3.00
ACCESSORY PLUG AND FOUR CRIMP-PINS (Molex-4 male plug). Unsoldered, no
wire
included. You construct your own accessory cable using your
own wires.
$0.75 for one set; $3.00 for five sets; $5.00 for ten sets.
===========================================================================
Shipping costs are EXTRA but these costs are minimized.
Mail payment to:
Stephen Buggie buggie@unm.edu
Psychology
Univ. of New Mexico/ Gallup
200 College Road
Gallup NM 87301
rev. 6/15/97, 2/6/06
Stephen Buggie (Ph.D., U.of Oregon) | (505) 863-7504 |
Psychology Professor | fax: (505) 863-7717 |
Univ. of New Mexico, Gallup | home:(505) 863-2390 |
200 College Rd. | buggie@unm.edu |
Gallup, NM 87301 | |
**=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=**
** Teaching: general psychology, experimental psychology, **
** brain & behavior, cognitive psychology, perception, **
** statistics, learning/memory, cross-cultural psychology **
** child psychology, motivation & emotion **
**=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=**